Update Mail.ps1

[m01devsecops]

Added the possibility to add a domain to the user

Description Of Changes

Motivation and Context

Testing

Operating Systems Testing

Change Types Made

• Bug fix (non-breaking change).
• Feature / Enhancement (non-breaking change).
• Breaking change (fix or feature that could cause existing functionality to change).
• Documentation changes.
• PowerShell code changes.

Change Checklist

• Requires a change to the documentation.
• Documentation has been updated.
• Tests to cover my changes, have been added.
• All new and existing tests passed?
• PowerShell code changes: PowerShell v2 compatibility checked?

Related Issue

Fixes #

[TheCakeIsNaOH]

@m01devsecops could you go and fill out the PR template? Additionally, could you open an issue for this.